GASKET FOR SECONDARY BATTERY

摘要

An object is to provide a gasket for a secondary battery having excellent compressive restoration characteristics. A gasket for a secondary battery (particularly for a lithium secondary battery) is a gasket used as an insulation seal of a secondary battery, and is a hot-press and cold-press molded product (particularly, a product which is hot-pressed into a gasket shape under a temperature condition lower than a melting point of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) that is used by 0° C. to 80° C. and is thereafter cooled under pressure) obtained by hot-pressing a skived sheet obtained by skiving a block-shaped molded body (particularly, a columnar or cylindrical molded body obtained by injecting a PFA raw material into a heated mold to be pressurized and cooling the material under pressure) made of a PFA to be deformed into a gasket shape and thereafter performing cold-pressing on the resultant to fix a shape thereof.

主权项

1. A gasket for a secondary battery, which is a gasket used as an insulation seal of a secondary battery,
wherein a material of the gasket is made of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), and the gasket is a hot-press and cold-press molded product obtained by hot-pressing a skived sheet obtained by skiving a block-shaped molded body made of the PFA so as to be deformed into a gasket shape and thereafter performing cold-pressing on the resultant to fix a shape thereof.